Brace



(No Model.) A 2 sheets-`sheet 1.

' C. SNEDEKUlVI.V

BRAGE. No. 319,430. Patented June 2, 1885.

ATTEST INVENTQH ffmjww M Mm (No'Model.) 2 Sheets-Sheet 2.

(o. SNEDEKUM. BRAE.

m4319430. Patented June 2, 1885.

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CHARLES SNEDEKUM, OF BAY CITY, MICHIGAN.

BRACE.

SPEIFICATICN forming part of Letters Patent No. 319,430, dated June 2, 1885.

Application filed December 2, 1884. (No model.)

To all whom it may concern:

Be it known that I, Gnannns SNEDEKUM, a citizen of the United States, residing at Bay City, in the county of Bay and State of Michigan, have invented certain new and useful Improvements in Angle-Braces, of which the following is a specification.

My improvement relates to those braces in which the drill-stock is operated by piniongear; and it consists in a simple arrangement of such gear, whereby the said stock is alternately driven in opposite directions, with the effect of increasing the sharpness and exactitude of the boring. To this end I mount upon the frame of the brace two half-gears oppositely faced, and connected with the driving mechanism, so as robe brought alternately into mesh with the pinion upon the head of the drill-stock.

In order that my invention may be more fully understood, I will proceed to describe it with reference to the accompanying drawings, in which- Figure 1 is aside elevationof my improved brace when adapted for hand use. Fig. 2 is a face view of the same. Fig. 3 shows the same invention in slightly modied form, adapted to be operated either by hand or by a drill-press. Fig. 4 is a face view of the Same. Fig. 5 is a detail view of a breastplate which may be applied to the brace shown in Figs. 3 and 4 when the same is t be operated by hand.

1 is the frame of the drill, having usual breast or hand plate, 2, fixed handle 3, and vertical bearing 4 for the drill or bit stock 5.

Upon the upper end of the stock 5 is keyed or otherwise rigidly fixed a straight or beveled pinion G.

Fixed to the frame above and transversely of the stock is a pin or stud, 7, upon which loosely revolves a sleeve or hub, 8, carrying two semicircular oppositely-faced gears, 9 10, upon the outer of which is rigidly attached a handle, 11. It will be seen that these gears are so arranged as to come alternately in contact with opposite sides of the pinion 6. Said gears are straight or beveled, according to the form of the teeth on said piniona They are not only rigidly held together by means of the hub 8, but by a web, 12, cast with said gears or lined rigidly `thereto.

Vhen intended for operation by machine, the form shown in Figs. 3 andai is preferably employed. In this the frame 1 of the brace is rectangular in shape, and the pin or stud 7 is made to project beyond the same, so as to bear a gear-wheel, 13, which meshes with the gear 14, keyed to the lower end of a shaft, 15, which may form the spindle of a drill-press, or be connected to said spindle in any suitable manner. Said shaft has bearing at its bottom, in the top of 4frame 1, as shown at 16, and is held in said bearing by a nut, 17.

Vhen it is desired to use this form of the brace for operation by hand, the shaft 15 may be detached from the spindle of the drill to the breast-plate 2, having central socket 18 placed over said shaft, and the drill then operated by revolving the handle 1l, as in the form er example.

It will be seen that in both forms of the brace, while the rotary motion of the handle and hub is continuous that of the pinion 6 is interrupted, depending for its direction on that one of the gears 9 1-0 which is for the time being in mesh therewith. The direction of rotation of the drill orbit fixed in the stock will therefore be rapidly reversed, and the boring will consequently be more exact and more sharply deiined than when inade by those drills in which the rotation is continuously in the same direction.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent- 1. In combination with a drill or bit stock and a brace-frame, the devices described, mounted on said frame for imparting motion alternately in opposite directions to said bitstock, substantially as and for the purpose set forth.

2. In combination with a brace-frame, abit or drill stock mounted therein, a pinion on the end of said stock, and two half-circular gears mounted on said frame in such manner as to alternately engage on opposite sides of said pinion, substantially as set forth.

3. In combination, with a brace-frame and stock, gears mounted on said frame for iinparting alternate motion in opposite directions to said stock, a shaft, also mounted in said frame, adapted to be connected to the spindle of a drill-press, and gears for transmit- IOO ting power to the reversing mechanism, sub- 6. The combination, in a drill-brace, ofthe stantial'ly as and for the purpose set forth. right and left segmental gear, the miter- 4. In combination with a brace, segmental wheels, their frame and bearings, and abreast, transmitting-gear mounted thereon, and a substantially as described. Y 5 shaft adapted to be connected With a spindle In testimony whereof I afix my signature I 5 of a drill-press, and aremovablehand or breast in presence of two witnesses.

plate having a socket to be occupied by lsaid CHARLES SNEDEKUM. shaft, substantially as set forth. A Witnesses:

5. The combination, with a drill-brace, of HENRY- LINDNER, i 1o the right andleft segmental gear, as described.` JosEPI-I P. HAFFEY. 

